Modern girl Lin Jiaojiao accidentally touches an ancient Song Dynasty scroll and unexpectedly transmigrates back to the Northern Song. She knows the histories well and is aware that Lin Zhanqiao, a young scion of a noble family, will later be framed by villains, branded a traitor, and ultimately suffer the tragic fate of seeing his family destroyed.
Filled with regret and resolve, Lin Jiaojiao decides to stay in the Song Dynasty, change his tragic fate, and protect Lin Zhanqiao, whose life is beset by hardship. When they first meet, Lin Zhanqiao is aloof and reserved. Caught between family feuds and political undercurrents at court, he is wary of everyone and trusts no one.
Drawing on her knowledge of the future, Lin Jiaojiao secretly helps him avert danger and uncover conspiracies time and again, quietly shielding the Lin family from disaster. As they spend their days together, her sincerity and warmth gradually melt Lin Zhanqiao's frozen heart. They slowly fall for each other and become devoted companions.
Political factionalism at court and trouble on the border soon follow one after another, but Lin Jiaojiao stays by his side, joining forces with him to thwart the schemes of their various enemies. In the end, the two of them clear the Lin family's name and protect its peace. Their meeting across time rewrites the fate already set in stone. Lin Jiaojiao succeeds in saving the man she loves, and the two return to their ancestral home to spend the rest of their lives together in peace.